TUBE AS 1656511 - Caterpillar

Preparing the Metal for Welding
Personal injury can result from flame cutting or welding on painted areas.The effect of gasses from burned paint is a hazard to the person doing the cutting or welding.Do not flame cut or weld on painted areas.
Before carrying out arc welding on the machine or on any equipment attached to the machine, disconnect all power and ground leads from the batteries in order to avoid possible damage to electronic components.
All grease, paint, and foreign objects must be removed before welding. Any of these materials will discharge gas which will cause porosity in the weld deposit. Water and rust will cause hydrogen embrittlement. Hydrogen embrittlement causes cracks in the weld deposit.Remove foreign objects with a wire brush, a buffer, or a grinder. Shot blasting the appropriate areas will also remove foreign material.Remove any oil or grease with a Caterpillar approved solvent.Note: After welding, allow all areas to cool to room temperature. After the areas have cooled, paint the area with primer. After the primer has dried, coat the area with Cat 4C-4200 Yellow Paint .Welding Procedure
Illustration 1 g02725479
Top View of the Stick (345D, 349D) (5) 4V-0969 Plate As (N1) AWS A5.18 ER70S-2 or equivalent (A) 200 mm (7.87 inch) (B) 500 mm (19.69 inch) (C) 800 mm (31.50 inch)
Illustration 2 g02728238
Top View of the Stick (349E) (5) 4V-0969 Plate As (N1) AWS A5.18 ER70S-2 or equivalent (A) 456 mm (17.95 inch) (B) 537 mm (21.14 inch) (C) 460 mm (18.11 inch) (D) 800 mm (31.50 inch)
Weld four plates (5) to the stick. Refer to Illustration 1 for 345D and 349D or Illustration 2 for 349E.
Prime and paint the welded areas and the plates.Installation Procedure of 343-5415 Coupler Lines Gp
Illustration 3 g02729794
(1) 4I-9521 Marker Band (2) 4I-9522 Marker Band (3) 4V-0611 Clamp (4) 4V-0612 Plate (6) 7K-1181 Cable Strap (7) 196-9994 Union Gp (9a) 344-6276 Hose As (9b) 344-6276 Hose As (11) 164-5570 Union As (12) 1B-9575 Bolt
Install marker bands (1) on each end of hose (9a) .Install marker bands (2) on each end of hose (9b) .
Route hose (9a) on the left side of the stick. Route hose (9b) on the right side of the stick.Install clamps (3), plates (4) and bolts (12) on the hoses on plates (5) .
Install union (7) in hose (9a) .Install union (11) in hose (9b) .
Illustration 4 g02724644
(1) 4I-9521 Marker Band (2) 4I-9522 Marker Band (6) 7K-1181 Cable Strap (8a) 334-0112 Hose As (8b) 334-0112 Hose As (9a) 344-6276 Hose As (9b) 344-6276 Hose As (10) 323-6157 Permanent Coupling As (11) 164-5570 Union As
Install unions (11) in hose (9a) and (9b) .
Temporarily connect hose (8a) to hose (9a) .Temporarily connect hose (8b) to hose (9b) .Route hoses (8a) and (8b) to the boom foot.If required, cut the hoses to length.Install permanent couplings (10)